import request from '../../utils/request'
import PubSub from 'pubsub-js'
// pages/recommendSong/recommendSong.js
Page({

  /**
   * 页面的初始数据
   */
  data: {
    day:'',
    month:'',
    recommendList:[],
    index:0 //点击音乐的下标
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    let userInfo = wx.getStorageSync('userInfo');
    if (!userInfo) {
      wx.showToast({
        title:'请先登录',
        icon:'none',
        success: () => {
          wx.reLaunch({
            url:'/pages/login/login'
          })
        }
      })
    }
    this.setData({
      day:new Date().getDate(),
      month:new Date().getMonth() +1
    })
    this.getRecommendList();
    // 订阅来自songDetail页面发来的ID，然后返回ID对应的数据
    PubSub.subscribe('switchType', (msg,type) =>{
      let {recommendList, index} =this.data;
      if (type === 'pre') { //上一首哦
        (index === 0) && (index=recommendList.length);
        index-=1;
      }else{ //下一首
        (index === recommendList.length -1) && (index =-1)
        index+=1
      }
      this.setData({
        index
      })
      let musicId = recommendList[index].id;
      PubSub.publish('musicId', musicId)
    })
  },
  // 每日推荐歌曲数据
  async getRecommendList(){
    let recommendListData = await request('/recommend/songs')
    this.setData({
      recommendList: recommendListData.recommend
    })
  },
  //点击跳转歌曲详情页
  toSongDetail(event){
    let {song, index} = event.currentTarget.dataset
    this.setData({
      index
    })
    wx.navigateTo({
      url:'/pages/songDetail/songDetail?musicId=' + song.id
    })
  },
  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {

  },

  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide: function () {

  },

  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {

  },

  /**
   * 页面相关事件处理函数--监听用户下拉动作
   */
  onPullDownRefresh: function () {

  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {

  },

  /**
   * 用户点击右上角分享
   */
  onShareAppMessage: function () {

  }
})